refactor(cj-cache): rename to cj-cache-lib for naming consistency

Library files in this codebase are suffixed `-lib' (system-lib.el is
the established precedent).  The Phase 5 cache helper landed as
cj-cache.el; the spec's table proposed names without the suffix and
I followed it without checking against convention.  Fix the
inconsistency now while there are only two consumers and one test.

Rename modules/cj-cache.el -> modules/cj-cache-lib.el; update
provide form, file header, and the three (require 'cj-cache) call
sites in org-agenda-config, org-refile-config, and test-cj-cache.
No behavior change.

1 files changed, 0 insertions, 95 deletions

diff --git a/modules/cj-cache.el b/modules/cj-cache.el
deleted file mode 100644
index b7d048c9..00000000
--- a/modules/cj-cache.el
+++ /dev/null
@@ -1,95 +0,0 @@
-;;; cj-cache.el --- Generic TTL cache with build-guard -*- lexical-binding: t; -*-
-
-;; Author: Craig Jennings <c@cjennings.net>
-
-;;; Commentary:
-
-;; Generic "rebuild a long-running computation behind a TTL" cache,
-;; with a building-flag guard that prevents duplicate concurrent
-;; rebuilds in async-build scenarios.
-;;
-;; Used by org-agenda-config and org-refile-config which previously
-;; carried parallel hand-rolled implementations of this exact shape.
-;; See docs/design/cache-helper-design.org for the API contract,
-;; consumer migration shape, and rationale for the deliberate "nil
-;; cached value reads as invalid" decision.
-;;
-;; Out of scope: buffer-local key-based caches like the modeline VC
-;; cache (different lifecycle).
-
-;;; Code:
-
-(require 'cl-lib)
-
-(defun cj/cache-make (&rest plist)
-  "Return a fresh cache state.
-PLIST keywords:
-- =:ttl= seconds to retain a built value (default 3600)."
-  (let ((ttl (or (plist-get plist :ttl) 3600)))
-    (list :value nil :time nil :ttl ttl :building nil)))
-
-(defun cj/cache-valid-p (cache)
-  "Return non-nil when CACHE has a fresh, non-nil value within its TTL.
-A nil cached value reads as invalid by design -- a build that legitimately
-returns nil rebuilds on the next request, matching the prior agenda/refile
-contract."
-  (let ((value (plist-get cache :value))
-        (time (plist-get cache :time))
-        (ttl (plist-get cache :ttl)))
-    (and value
-         time
-         (< (- (float-time) time) ttl))))
-
-(defun cj/cache-building-p (cache)
-  "Return non-nil when a build is currently in progress on CACHE."
-  (plist-get cache :building))
-
-(defun cj/cache-invalidate (cache)
-  "Clear CACHE's value and timestamp.  TTL is preserved."
-  (plist-put cache :value nil)
-  (plist-put cache :time nil))
-
-(cl-defun cj/cache-value-or-rebuild (cache build-fn
-                                           &key force-rebuild
-                                           on-hit
-                                           on-build-start
-                                           on-build-success
-                                           on-build-error)
-  "Return CACHE's value, calling BUILD-FN to rebuild when invalid.
-
-When CACHE is valid and FORCE-REBUILD is nil, return the stored value
-and call ON-HIT (if given) with the value.  Otherwise call BUILD-FN,
-store its result, and return it.
-
-The four callbacks let the consumer log without this helper printing on
-its behalf:
-- ON-HIT (value)
-- ON-BUILD-START ()
-- ON-BUILD-SUCCESS (value)
-- ON-BUILD-ERROR (err)
-
-The :building flag is set before BUILD-FN runs and cleared inside an
-`unwind-protect' regardless of outcome.  Errors from BUILD-FN are
-rethrown after ON-BUILD-ERROR fires."
-  (cond
-   ((and (not force-rebuild) (cj/cache-valid-p cache))
-    (let ((value (plist-get cache :value)))
-      (when on-hit (funcall on-hit value))
-      value))
-   (t
-    (when on-build-start (funcall on-build-start))
-    (plist-put cache :building t)
-    (unwind-protect
-        (condition-case err
-            (let ((value (funcall build-fn)))
-              (plist-put cache :value value)
-              (plist-put cache :time (float-time))
-              (when on-build-success (funcall on-build-success value))
-              value)
-          (error
-           (when on-build-error (funcall on-build-error err))
-           (signal (car err) (cdr err))))
-      (plist-put cache :building nil)))))
-
-(provide 'cj-cache)
-;;; cj-cache.el ends here